气候-碳循环相互作用和特里亚斯纪晚期卡尔尼亚雨期的空间异质性
Xiangdong Zhao1,2, Naihua Xue3,4, Hu Yang5
1State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China.
Nature communications
|June 30, 2025
概括
卡尔尼亚雨季 (CPE) 是数百万年前的一个温暖时期,由火山活动引发,影响了地球的碳和水循环. 它的变化为了解类似的过去和未来气候事件提供了线索.
科学领域:
- 古气候学 古气候学
- 地球系统科学 地球系统科学
- 地质化学 地质化学
背景情况:
- 卡尔尼亚雨期 (CPE) 是一个显著的超热事件 (在2.34亿至2.32亿年前),目前尚不清楚.
- 了解过去的温暖时期对于预测未来的气候变化和地球系统反应至关重要.
研究的目的:
- 通过使用高分辨率的多代理记录来调查卡尔尼亚雨季事件的原因和影响.
- 在这个古老的温暖事件中分析碳和水文循环之间的相互作用.
- 为了比较CPE的动态与其他Cenozoic温暖时期.
主要方法:
- 来自中国格尔盆地的卡尔尼亚湖连续的综合多代理分析.
- 高分辨率约会 (~2-10 kyr) 来重建事件时间表.
- 稳定同位素分析 (δ13Corg) 来追踪碳循环的动态.
- 古水文重建以了解降水模式的变化.
主要成果:
- 快速发作的CPE (~15.8 kyr) 与火山活动和随后的碳循环反有关.
- 在CPE期间的地球碳循环显示出与405kyr异心周期的相内关系.
- 水文循环表现出大陆干旱的增加以及低度和极地地区明显的降水模式.
- CPE碳和水文变化与其他已知的温暖事件有相似之处.
结论:
- 火山活动和碳循环反可能启动了卡尔尼亚暴雨事件.
- 该CPE提供了一个模型来理解由轨道强迫影响的温暖气候-碳循环相互作用.
- 该事件的水文变化突出显示了区域对全球变暖的复杂反应.
- 研究CPE为地球系统在高热时期的运作提供了宝贵的见解.
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